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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

Alprazolam EP Impurity G chemical structure

Alprazolam EP Impurity G

CAS: 448950-89-8
Formula: C₁₇H₁₃ClN₄
MW: 308.8 g/mol

VQ-035665

Reference Standard

Alprenolol EP Impurity A chemical structure

Alprenolol EP Impurity A

CAS: 63905-22-6
Formula: C₁₂H₁₆O₃
MW: 208.25 g/mol

VQ-028956

Reference Standard

Alprenolol Hydrochloride chemical structure

Alprenolol Hydrochloride

CAS: 13707-88-5
Formula: C₁₅H₂₄ClNO₂
MW: 285.81 g/mol

VQ-020773

Reference Standard

Alprenolol Hydrochloride EP Impurity B chemical structure

Alprenolol Hydrochloride EP Impurity B

CAS: 1745-81-9
Formula: C₉H₁₀O
MW: 134.17 g/mol

VQ-028957

Reference Standard

Alprostadil chemical structure

CAS: 745-65-3
Formula: C₂₀H₃₄O₅
MW: 354.5 g/mol

VQ-021511

Reference Standard

Alprostadil EP Impurity C chemical structure

Alprostadil EP Impurity C

CAS: 22973-19-9
Formula: C₂₀H₃₂O₅
MW: 352.5 g/mol

VQ-021514

Reference Standard

Alprostadil EP Impurity D chemical structure

Alprostadil EP Impurity D

CAS: 20897-91-0
Formula: C₂₀H₃₄O₅
MW: 354.5 g/mol

VQ-021519

Reference Standard

Alprostadil EP Impurity E chemical structure

Alprostadil EP Impurity E

CAS: 24570-01-2
Formula: C₂₀H₃₄O₅
MW: 354.5 g/mol

VQ-021521

Reference Standard

Alprostadil EP Impurity F chemical structure

Alprostadil EP Impurity F

CAS: 21003-46-3
Formula: C₂₀H₃₄O₅
MW: 354.5 g/mol

VQ-021520

Reference Standard

Alprostadil EP Impurity J chemical structure

Alprostadil EP Impurity J

CAS: 217182-28-0
Formula: C₂₃H₄₀O₅
MW: 396.6 g/mol

VQ-021518

Reference Standard

Alternariol chemical structure

CAS: 641-38-3
Formula: C₁₄H₁₀O₅
MW: 258.23 g/mol

VQ-032883

Reference Standard

Alternariol-9-Methyl Ether chemical structure

Alternariol-9-Methyl Ether

CAS: 23452-05-3
Formula: C₁₅H₁₂O₅
MW: 272.25 g/mol

VQ-045180

Reference Standard

Althiazide chemical structure

CAS: 5588-16-9
Formula: C₁₁H₁₄ClN₃O₄S₃
MW: 383.9 g/mol

VQ-020774

Reference Standard

Altiratinib chemical structure

CAS: 1345847-93-9
Formula: C₂₆H₂₁F₃N₄O₄
MW: 510.5 g/mol

VQ-045241

Reference Standard

Altizide EP Impurity B chemical structure

Altizide EP Impurity B

CAS: 84522-35-0
Formula: C₇H₁₄O₂S
MW: 162.25 g/mol

VQ-021522

Reference Standard

Altrenogest chemical structure

CAS: 850-52-2
Formula: C₂₁H₂₆O₂
MW: 310.4 g/mol

VQ-021523

Reference Standard

Altretamine chemical structure

CAS: 645-05-6
Formula: C₉H₁₈N₆
MW: 210.28 g/mol

VQ-024214

Reference Standard

Altretamine chloro keto analog chemical structure

Altretamine chloro keto analog

CAS: 63537-70-2
Formula: C₅H₇ClN₄O
MW: 174.59 g/mol

VQ-044124

Reference Standard

Altretamine diketo analog chemical structure

Altretamine diketo analog

CAS: 13704-43-3
Formula: C₅H₈N₄O₂
MW: 156.14 g/mol

VQ-044123

Reference Standard

Altretamine keto analog chemical structure

Altretamine keto analog

CAS: 33979-07-6
Formula: C₇H₁₃N₅O
MW: 183.21 g/mol

VQ-044125

Reference Standard

Alverine chemical structure

CAS: 150-59-4
Formula: C₂₀H₂₇N
MW: 281.4 g/mol

VQ-028902

Reference Standard

Alverine Citrate chemical structure

Alverine Citrate

CAS: 5560-59-8
Formula: C₂₆H₃₅NO₇
MW: 473.6 g/mol

VQ-024216

Reference Standard

Alverine EP Impurity A chemical structure

Alverine EP Impurity A

CAS: 104-52-9
Formula: C₉H₁₁Cl
MW: 154.63 g/mol

VQ-020775

Reference Standard

Alverine EP Impurity B chemical structure

Alverine EP Impurity B

CAS: 122-97-4
Formula: C₉H₁₂O
MW: 136.19 g/mol

VQ-020776

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